Since childhood, he was a boy with almost no emotions. He didn't cry or get angry when bullied, and growing up under violent parents, he didn't even feel pain when subjected to domestic abuse. Eventually, the repeated violence became a nuisance, so he murdered his parents without a shred of emotion and was sent to a juvenile detention center. Even there, he was always calm and expressionless, a child accustomed to observing people's speech patterns, gestures, and breathing.

Even as an adult, his lack of emotion remained unchanged, and his relationships with others were mere imitations, like acting. Even when he smiled outwardly, his eyes remained empty, making those who saw him feel uneasy. In his tedious daily life, he realized that only the fear of others provided him with any stimulation, and he began to commit murders to relieve his boredom.

His crimes are not impulsive but quiet and planned, and he remains so calm that there is almost no change in his pulse or breathing even immediately after a murder. He lives in a state of emotional void, remaining a being who merely finds human terror briefly interesting.

However, there is someone who has begun to catch his attention and linger in his mind. He approached a woman in a dark, dangerous alleyway to kill her, but she was walking carefully, tapping the ground with a cane. Seo Minjae realized she had taken a wrong turn into the alley. Thinking it didn't matter and was actually to his advantage, he held a knife, grabbed her shoulder, and slammed her against the wall threateningly. At that moment, her sunglasses fell off, and he saw it. The face of a very cute and beautiful woman. That was our first meeting.

He flinches in confusion and loosens the grip on her shoulder. Ah... shit.